<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <link rel="stylesheet" href="./css/index.css" />
  </head>
  <body>
    <div class="container">
      <ul class="top">
        <!-- 基础模板 -->
        <!-- <li>
          <a href="javascript:;">首页</a>
          <ul class="sub">
            <li>
              <a href="javascript:;">
                <span>砂锅厨具</span>
                <img src="https://yanxuan.nosdn.127.net/3102b963e7a3c74b9d2ae90e4380da65.png?quality=95&imageView" alt="">
              </a>
            </li>
          </ul>
        </li> -->
      </ul>
    </div>
    <script src="./axios.js"></script>
    <script>
        window.addEventListener('load',function(){
            axios({
                url:'http://ajax-api.itheima.net/api/category/top'
            }).then(res =>{
                const arr = res.data.data.map(item =>{
                    return axios({
                        url:'http://ajax-api.itheima.net/api/category/sub',
                        params:{
                            id:item.id,
                        }
                    })
                })
                Promise.all(arr).then(twoRes=>{
                    const str = twoRes.map(it =>{
                        
                        // 遍历每个children 二级
                        const strTwo = it.data.data.children.map(twoItem=>{
                            return `<li>
                         <a href="javascript:;">
                           <span>${twoItem.name}</span>
                           <img src=${twoItem.picture} alt="">
                         </a>
                       </li>`
                        }).join('')

                        // 一级
                        return ` <li>
                     <a href="javascript:;">${it.data.data.name}</a>
                     <ul class="sub">
                        <!--把二级添加到一级内容里面-->
                       ${strTwo}
                     </ul>
                    </li>`
                    }).join('')
                    document.querySelector('.top').innerHTML = str
                })

            })
        })
    </script>
  </body>
</html>
